Load Balancer

Automatic Distribution of Server Traffic Load

Load Balancer helps provide reliable services by distributing traffic to multiple servers in case of traffic overload. A server distribution method is applied according to the situation. For a traffic overload or failure that is difficult to be predicted by users, health check on the connected server and detouring the traffic to another server ensure the reliability and continuity of service.

Overview

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Service Architecture

Internet → Load Balancer → Subnet - VM,VM ... / Subnet - VM,VM ... → VPC

Key Features

  • Load Balancer instance and service creation

    - Create a Load Balancer instance in the project with VPC
    - Create LB service within the LB instance and register a service that receives traffic and a server that will take distributed load
    - Multiple servers may be registered, either from the server group within the same LB instance or Auto-scaling group defined in VPC

  • Server group setting

    - LB services created within the same LB instance can share server groups
    - Select the created resources to add a server group member
    - Apply load balancing weight to the server group member

  • Security Group setting

    - Use a Security Group if an external network needs to access LB service

Pricing

    • Billing
    • Load Balancer instance cost + Load Balancer service cost
    • Charged by the hour used
    • Load Balancer cost varies by the size (small/medium/large)
    • Metering
    • Time of Load Balancer instance usage
    • Time of Load Balancer target registered in the service
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